Trolley-head.



' E. N. MOCALL.

TROLLEY HEAD.

APPLIOATION FILED DBO. 21, 190s.

Patented NOV. 29, 1910.

vn SHEETS-SHEET 1.

B. N. MGCALL.

TROLLEY HEAD.

APPLIUATION FILED DB0. 21, 190s.

Patented Nov. 29, 1910.

2 SHEETS-SHEET 2.

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NT FFICE.

EARL N. MCCALL, OF GOLIBFIELD, NEVADA.

TROLLEY-HEAD.

Speccation of Letters Patent.

Application led December 21, 1908.

Patented Nov. 29, 1910. serial No. 468,646.

To all whom it may concern.'

Be it known that I, EARL N. MCCALL, a citizen of the United States,residing at Goldtield, in the county of Esmeralda, State of Nevada, haveinvented certain new and useful Improvements in Trolley-Heads; and I dohereby declare the following to be a full, clear, and exact descriptionof the invention, such as will enable others skilled in the artto whichit appertains to make and use the same.

The invention relates to trolley heads and more particularly to theclass of trolley heads for collecting current for electric railways. n

The primary object of the invention is the provision of a trolley headin which there are mounted two or more trolley wheels which lattercontact and travel upon a trolley wire charged with current that isadapted to be collected by peculiar means coperative with t-he trolleymeans to deliver the said current directly to the motor of an electricrailway car.

Another objectof the invention is the provision of a trolley head havingcurrent collecting means to deliver a currentfrom the overhead trolleywire in a unique and positive manner to the motor of an electric railwaycar and which means is simple in construction and thoroughly etticientin operation.

A still furtherobject of the invention is the provision of a trolleyhead for electric railways in which there are provided a plurality oftrolley wheels having coperative current collecting' means to convey acurrent from the overhead trolley wire to the motor of an electricrailway'car whereby the current is utilized for causing the travel ofthe railway car.

A still further object of the invention is the provision of a trolleyhead for electric railways which shall be cheap to manufacture but yethas the requisite amount of strength and that is capable of automaticadjustment on a pole whereby it can at all times be maintained in properalinement relative to a trolley wire.

Vith these and other objects in view the invention consists in theconstruct-ion, combination and arrangementof parts as will behereinafter more fully described, illustrated in the accompanyingdrawings, disclosing the preferred form of embodiment of the inventionand pointed out in the claim hereunto appended.

ln the drawingsz-Figure 1 is a side elevation of a trolley pole, trolleywire and the trolley head embodying' the invention mounted upon the poleand in contact with the wire. F ig. 2 is a vertical longitudinalsectional view through the head and pole. F ig. 3 is a top plan view ofthe head. Fig. 4 is a sectional view on t-he line 4-4 of Fig. 1. Fig. 5is a detail side elevation of a brush adapted to be detachably mountedupon the head for cleaning the trolley wire. Fig. 6 is a detailperspective view'of an ice scraper to be mounted in lieu of the brushfor scraping the trolley wire.

1 imilar reference characters indicate corresponding parts throughoutthe several views in the drawings.

Referring to the drawings by numerals 10 designates the trolley polewhich is of hollow cylindrical formation of the ordinary well knownconstruction having formed integral at its upper end a circular flatbearing terminal 11 having a central aperture communicating with thebore of the trolley pole, the opening has threaded therein a hollow stem12 formed with an annular flange 13 and around which stem is swiveled abase or main supporting plate 14 of substantially rectangular shape uponwhich is mounted an insulating' sheet of material such as mica the samebeing of a size corresponding to the plate and upon which issuperimposed a head casting 16 the latter being also of correspondingshape relative to the supporting plate and is counterbored to receivethe flange 13 of the stem 12 so that its upper face will be flush withthe upper face of the base of the casting.

The head casting 16 is fixed to the supporting plate 14 by means of boltmembers 17 which are insulated both from the supporting plate and headcasting by means of insulating sleeves 18 surrounding the said boltmembers, the latter being passed through the base of the casting, themica sheet and the supporting plate. Rising from opposite longitudinalsides of the head casting 16 are vertical alining bearings 19 in whichare journaled stud axles 20 the same supporting trolley wheels 22 whichare fixed to the axle by means of set screws 2l, the trolley wheelsbeing adapted to contact with a trolley wire 23 of the ordinaryconstruction which is charged with an electric current.

Extending laterally centrally from opposite sides of the trolley wheels22 circumferentially of the axles 2O are annular shoulders Q4: the outerfaces of which contact with removable collars which surround the outerends of the axles and are disposed in openings of a corresponding sizethereto in the vertical bearings 19, the collars 25 being held xed inthe said vertical bearings by means of set screws 21 carried by thebearings and engaging said collars. These collars by reason of theshoulders 24 projecting outwardly from opposite sides of the wheels arespaced from the contact faces 26 of the said trolley wheels for apurpose as will be hereinafter more fully described.

Secured to the base of the head casting 16 are inverted U-shapedresilient` members 26 which latter have their legs bifurcated at theirupper ends to form forked resilient `extremities 27 to straddle theannular shoulders Q-t of the trolley wheels so that the said extremities27 will constantly contact with the Contact faces 26 of the trolleywheels `between the latter and t-he said collars 25 carried by thevertical bearings of the casting head.

lilithin the hollow stem 12 is an insulating sleeve 2S through whichpasses the electric current carrying lead wires Q9 which latter havetheir upper terminals connected to binding posts or screws 30 passedthrough the inverted U-shaped collector members 26 .and engaging thebase of the head casting, the said posts 30 serving to connect theterminals :of the wires 29 to the collector memi bers and also toconnect the lead to the head casting. These lead wires 29 pass downthrough the hollow trolley pole to themotor (not shown) of an electricrailway car.

Attached to :the trolley pole 10 at the upper end -thereof is a springfinger 31 the free end of which engages in an arcuate shaped recess inan offset 32 projecting rearwardly from the head castingl 1G, t-hespring being adapted to maintain the trolley head steady and :againstfree shifting movement on the pole. This spring has its free endfrictionally engaging the side walls of the arcuate shaped recess in theolfset 32 so that the troli ley head when engaging the trolley wire willbe held against free rotation upon the trolley pole so that the saidhead will constantly aline with the trolley wire during the travel of arailway car yet the said head is permitted to slightly turn when therailway car is taking .a kcurve in the track.

At the forward end of the head casting 1G Vin advance of the smalltrolley wheel there is formed a socket 33 in the front wall of the saidcasting in which is detachably mounted a stem 34 of a brush 35 which isadapted to contact with the trolley wire 23 in advance of the trolleywheels so as to clean the said trolley wire of accumulated substancesthereon. The said stem 34 of the brush is secured inthe socket 33 bymeans of the usual sct screws 36 thus by the use of the latter the saidstem may be detached and in lieu thereof an ice cleaner 37 can bemounted in the said socket. This ice cleaner comprises a stem 38 havingpivotally mounted in its upper forked end a roller 39 provided with acorrugated or roughened working tace 1l() for contact with the trolleywire so as to cut the accumulated ice or sleetupon the said wire.

It will be noted that an electric current is collected from the trolleywire 23 through lthe medium of the trolley wheels 22 traveling thereonand is conveyed by the forked extremities 27 of the collecting membersQG through the electric wires 29 -to a -inotor (not shown) or anelectric railway car. rlhe annular shoulders 2t prevent lateral.displacement of the trolley wheels 22 should the set screws 21 thereinbecome loose land thereby obviate the possibility of the said trolleywheels disengaging the trolley wires while the wheels are travelingthereon. The reason for employing the detachable collars 25 .is that therotation of the axle will not wear away the vertical bearings 19 of thehead casting but will wear directly upon the said collars 25.

lWhat is claimed is :f-

The combination with a trolley pole having an enlarged Hat bearingterminal, of a casting having a base with spaced vertical bearingsrising therefrom, a supporting plate secured to the base of the castingand insulated therefrom, the said supporting plate being provided with acentral flat faced boss resting upon the bearing terminal of the pole,the said base of the casting being provided with a central countersink,a hollow stem loosely passed through the base of `the casting and thesupporting plate and having one end inserted in the bearing of thetrolley pole, a head formed on the opposite end `of the hollow stem .andreceived in the countersink, whereby the outer surface of the head willlie flush with the outer surface of the base of the casting, trolleywire engaging wheels `iournaled in the bearings, and yieldable collectorelements fixed to the base of the casting and having resilient forkedextremities engaging opposite sides of the said wheels.

In testimony whereof, I atiix my signature, in presence of twowitnesses.

EARL N. MGCALL.

lVitnesses JOHN R. DALEY, P. 1V. DALEY.

